; ; . Jurnal Ilmiah Sains, [S. l.], v. 18, n. 2, p. 63–66, 2018. DOI: 10.35799/jis.18.2.2018.20301. Disponível em: https://ejournal.unsrat.ac.id/v3/index.php/JIS/article/view/20301. Acesso em: 18 jul. 2024.